My Marshall dual super lead is acting weird!?!

I had my amp "serviced" professionally buy Amp crazy in Hollywood. The problem was my el-34 tubes I can't remember if they are the pre-amp or power tubes, but that doesn't matter. I had some groove tubes in it, the el34gt's(hardness 7) and it turns out that I had sucked the life out of them and it was time for a new matched set(four). The tech told me that grooves tubes are the same as any other tube and he put in some Telsa el34 and checked every circut. He did a good job other than the tube selection, I think? I could be wrong but to me my amp sound a little lighter, more classic, which is the opposite of The tone I prefer which is exremely heavy yet defined. Anyways now to the problem, My amp sounds great at a lower volume, but once I start to push the volume up, the tone sounds rough and honky, not good. It never sounded like that before? The tech told me That I didn't have to replace the ecc83 tubes ever. Any how, if I replace the ecc83s will it even out my sound at higher volumes? Or is this just normal and should be compensated with a power amp or attenuator? Is there any other reason for the problem?

I think that you and this tech have different ideas about what your amp should sound like. Most Marshall owners would kill for the setup you have now, but that's not what you asked for. Hardness 7 is way higher than Groove Tubes usually recommends. You probably had to insist that you wanted 7's, not 4's. I had the same hassle when I retubed my Ampeg VT-22 with new 7027A's.

You will have to get your tech to understand that you are paying him for his ability to fulfil [u]your[/u] requirements, not his. Some techs get a 'Guru Complex' that puts their ego ahead of your specifications. Be polite, but [u]firm[/u].